.wrap{
  display: flex;
}


.calcu{
  width: 500px;
  margin: 0 auto;
}
.input{
  width: 100%;
  height: 60px;
}
.ul{
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  align-content: space-between;
  height: 230px;
  li{
    width: 23%;
    height: 50px;
    background: gray;
    text-align: center;
    line-height: 50px;
    font-size: 26px;
  }
}